US2004023052A1PendingUtilityA1

Matte surface film

46
Priority: Jul 31, 2002Filed: Jul 31, 2002Published: Feb 5, 2004
Est. expiryJul 31, 2022(expired)· nominal 20-yr term from priority
Inventors:Benoit Ambroise
B32B 7/027Y10T428/31938B32B 37/153B32B 27/08Y10T428/31909B32B 7/12B32B 2250/242B32B 27/20B32B 2323/10B32B 27/32B32B 2323/043B32B 2307/408
46
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Claims

Abstract

A multi-layered polymeric film comprising a core layer comprising a polyolefin, and a first skin layer comprising a low melting point polyolefin and a matte producing agent, and a method for producing same.

Claims

exact text as granted — not AI-modified
We claim:  
     
         1 . A multi-layered polymeric film comprising: 
 (a) a core layer comprising a polyolefin, wherein the core layer comprises an interior of the film;    (b) a first skin layer comprising a low melting point polyolefin and a matte producing agent, wherein the first skin layer is engaged with and exterior to the core layer.    
     
     
         2 . The film of  claim 1  wherein the core layer comprises a material selected from the group consisting of polypropylene and polyethylene.  
     
     
         3 . The film of  claim 1  wherein the matte producing agent is selected from the group consisting of aluminum oxide, aluminum sulfate, barium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate (kaolin clay), magnesium silicate (talc), silicon dioxide, titanium dioxide, and mixtures thereof.  
     
     
         4 . The film of  claim 1  wherein the matte producing agent comprises calcium carbonate.  
     
     
         5 . The film of  claim 1  wherein the core layer comprises high density polyethylene.  
     
     
         6 . The film of  claim 1  wherein the core layer comprises isotactic polypropylene.  
     
     
         7 . The film of  claim 1  wherein a melting point of the core layer is at least about 5° C. higher than a melting point of the low melting point polyolefin.  
     
     
         8 . The film of  claim 1  wherein the film is oriented while the low melting point polyolefin is at a temperature equal to or greater than the melting point of the low melting point polyolefin.  
     
     
         9 . The film of  claim 8  further comprising: 
 an additional outer layer engaged with an exterior side of the first skin layer.  
 
     
     
         10 . The film of  claim 1  wherein the multi-layered polymeric film is substantially non-opaque having a haze of equal to or less than about 50%.  
     
     
         11 . A multi-layered polymeric film comprising: 
 (a) a core layer comprising a polyolefin, wherein the core layer comprises an interior of the film;    (b) a first transition layer comprising a low melting point polyolefin and a matte producing agent, wherein the first transition layer is exterior to the core layer;    (c) a first skin layer comprising a polyolefin, wherein the first skin layer is exterior to the core layer and the first transition layer.    
     
     
         12 . The film of  claim 11  wherein the polyolefin of the first skin layer is a low melting point polyolefin.  
     
     
         13 . The film of  claim 11  further comprising: 
 a second skin layer comprising a low melting point polyolefin, wherein the second skin layer is exterior to the core layer on a side of the core layer opposite the first transition layer and the first skin layer.  
 
     
     
         14 . The film of  claim 11  further comprising: 
 a second transition layer comprising a low melting point polyolefin, wherein the second transition layer is exterior to the core layer on a side of the core layer opposite the first transition layer and the first skin layer; and  
 a second skin layer comprising a low melting point polyolefin, wherein the second skin layer is exterior to the core layer and the second transition layer.  
 
     
     
         15 . The film of  claim 11  wherein the core layer comprises a material selected from the group consisting of polypropylene and polyethylene.  
     
     
         16 . The film of  claim 15  wherein the core layer comprises a material selected from the group consisting of isotactic polypropylene and HDPE.  
     
     
         17 . The film of  claim 11  wherein the matte producing agent of the first transition layer is selected from the group consisting of aluminum oxide, aluminum sulfate, barium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate (kaolin clay), magnesium silicate (talc), silicon dioxide, titanium dioxide, and mixtures thereof.  
     
     
         18 . The film of  claim 11  wherein the matte producing agent of the first transition layer comprises calcium carbonate.  
     
     
         19 . The film of  claim 11  wherein the low melting point polyolefin has a melting point at least about 5° C. less than the melting point of the polyolefin of the core layer.  
     
     
         20 . The film of  claim 13  wherein the second skin layer comprises a low melting point polyolefin and a matte producing agent.  
     
     
         21 . The film of  claim 13  wherein the second transition layer comprises a low melting point polyolefin and a matte producing agent.  
     
     
         22 . A multi-layered polymeric film comprising: 
 (a) a core layer comprising a polyolefin, wherein the core layer comprises an interior of the film;    (b) a first transition layer comprising polyolefin agent, wherein the first transition layer is exterior to the core layer;    (c) a first skin layer comprising a low melting point polyolefin, wherein the first skin layer is exterior to the core layer and the first transition layer.    
     
     
         23 . A method of producing a multi-layered film comprising the steps of: 
 (a) coextruding a skin layer comprising a low melting point polyolefin and a matte producing agent, with a core layer comprising a polyolefin; and    (b) orienting the coextruded skin layer and core layer in the machine direction at an elevated temperature, wherein the elevated temperature is at least about the melting point of the low melting point polyolefin.    
     
     
         24 . The film of  claim 23  further comprising: 
 orienting the skin layer and the core layer in the transverse direction at an elevated temperature, wherein the elevated temperature is at least about the melting point of the low melting point polyolefin.  
 
     
     
         25 . A multi-layered polymeric film comprising: 
 (a) a core layer comprising a polyolefin having a first side and a second side;    (b) a first transition layer comprising a low melting point polyolefin and a matte producing agent having a first side and a second side wherein the second side of the first transition layer is adjacent to the first side of the core layer;    (c) a first skin layer comprising a polyolefin having a first side and a second side wherein the second side of the first skin layer is adjacent to the first side of the first transition layer.    
     
     
         26 . The film of  claim 25  further comprising a second skin layer comprising a polyolefin having a first side and a second side wherein the first side of the second skin layer is adjacent to the second side of the core layer.  
     
     
         27 . The film of  claim 25  further comprising a second transition layer comprising a polyolefin wherein the second transition layer has a first side and a second side wherein the first side of the second transition layer is adjacent to the second side of the core layer, and further comprising a second skin layer comprising a polyolefin wherein the second skin layer has a first side and a second side wherein the first side of the second skin layer is adjacent to the second side of the second transition layer.  
     
     
         28 . The film of  claim 26  wherein the second skin layer comprises a low melting point polyolefin and a matte producing agent.  
     
     
         29 . The film of  claim 26  wherein the second transition layer comprises a low melting point polyolefin and a matte producing agent.

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